<template>
    <div class="hello">
        <h1>{{ msg }}</h1>
<!--        <h1>{{ send }}</h1>-->
        <input type="button" value="子传父" @click="setMsg">
    </div>
</template>

<script>
    export default {
        name: 'HelloWorld',
        props: {
            msg: String,
            // send: String
        },
        // props: ['msg']
        data(){
            return{
                message:'子向父传递'
            }
        },
        methods: {
            setMsg(){
                this.$emit('msg', this.message)
            }
        }
    }
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
    h3 {
        margin: 40px 0 0;
    }

    ul {
        list-style-type: none;
        padding: 0;
    }

    li {
        display: inline-block;
        margin: 0 10px;
    }

    a {
        color: #42b983;
    }
</style>
